Katie's confession about my little sister

So, one of the reasons I like spending time at home from college during break is that I have access to my little sister's used panties. Yes, I am obsessed with my sister's panties and I'm sure that grosses some of you out. For a few years, I've noticed that when she plays sports, her thongs she wears under her compression shorts get really, really sweaty. I've also noticed that after she plays, or works out or whatev that she likes to get off when she gets home. Our bedrooms share a wall and I can hear the hum of her vibrator through the wall. After a shower she'll discard the used underwear in her hamper in her room. That's when I swoop in and take them. I'll get off a few times to their smell because I've never smelled anything like them!! So, its like sweaty, but really musky strong smell that always has some milky girlcum on them. So after that I'll wear them for a few days (yeah I'm a perv) get off one more time and put them back in her hamper. So there ya go, my sister's panties are my obsession and Michelle thinks I'm weird lol.